Apparatus and methods for well cementing
US8789582B2 · kind B2 · utility
17Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2010 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Aug 4, 2030 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B33/165
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An apparatus for regulating fluid-flow during a primary cementing job comprises a bottom cementing plug, adapted to house a one-way valve and means to regulate fluid flow through the plug interior. The apparatus is useful for minimizing or preventing free fall or U-tubing during primary cementing. The apparatus is compatible with conventional cementing-plug launching systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.